Temperature inter-compensation for single-line optical fiber sensors based on Brillouin and fiber Bragg grating technique

In order to solve the problems that absolute temperature compensation for strain sensing of single line optical fiber sensors based on Brillouin and fiber Bragg grating encounters, e.g. high cost and difficulty of installation, a novel temperature inter-compensation method was presented. Based on a sensor, i.e,a dual fiber reinforced polymer-fiber Bragg grating rebar, experiments were carried out under room and outdoor environments. The results show that the temperature inter-compensation can be easily realized with a practically acceptable error less than 8%. Moreover this method can also give the dual parameters of strain and temperature values simultaneously. The system based on optical fiber sensors is suitable for practical applications for its simple structure and low cost.